The Cryosphere, 13, 1635–1659, 2019 https://doi.org/10.5194/tc-13-1635-2019 © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License. Warming temperatures are impacting the hydrometeorological regime of Russian rivers in the zone of continuous permafrost Olga Makarieva1,2, Nataliia Nesterova1,3, David Andrew Post4, Artem Sherstyukov5, and Lyudmila Lebedeva2 1Saint Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg, 199034, Russia 2Melnikov Permafrost Institute, Merzlotnaya St., 36, Yakutsk, 677010, Russia 3State Hydrological Institute, 23 2-ya liniya VO, St. Petersburg, 199053, Russia 4Commonwealth Scientific and Industrial Research Organisation, GPO Box 1700, Canberra, Australia 5All-Russia Research Institute of Hydrometeorological Information – World Data Centre, 6 Korolyov St., Obninsk, Kaluga Region, 249035, Russia Correspondence: Olga Makarieva (
[email protected],
[email protected]) Received: 2 August 2018 – Discussion started: 10 September 2018 Revised: 3 April 2019 – Accepted: 19 April 2019 – Published: 14 June 2019 Abstract. Large Arctic river basins experience substantial five gauges show an increase of 86 % or 12.2 mm in spring variability in climatic, landscape, and permafrost conditions. floods via an abrupt change in 1987–1993. The changes in However, the processes behind the observed changes at the spring freshet start date are identified for 10 gauges; the ear- scale of these basins are relatively poorly understood. While lier onset in May varies from 4 to 10 d over the observational most studies have been focused on the “Big 6” Arctic rivers period. We conclude that warmer temperatures due to cli- – the Ob’, Yenisey, Lena, Mackenzie, Yukon, and Kolyma – mate change are impacting the hydrological regime of these few or no assessments exist for small and medium-sized river rivers via changes in precipitation type (rain replacing snow).